We're about to setup a free WiFi to be used by our customers.
While in another topic people have helped me out greatly on how to do this, I would like to find a WiFi router that has an "agreement" page to it, that users have to accept, before they can access the i-net.

Ever been to Starbucks? They have exactly what I like to do. A simple agreement page, and you're online.

It also should be possible for me to setup times, when users can access the internet (blocking access after-hours).

Anyone any suggestions on what WiFi router to get that has this, that would fit in a smaller budget (about $100 to spend).

FYI:
The WiFi router will be assigned it's own public ip-address via our ISP, and will be outside our company network.

Thanks for your help Ryan, but I try to eliminate adding multiple things here.
This wifi router will not be placed after a seperate firewall.
Most wifi routers have a simple firewall build in, and that's good enough for this purpose ;o)

So I rather spend a little more on a good wifi router with these capabillities, vs. buying multiple things that are all cheap.

Just buy a Meraki access point, they are the best public WiFi APs. Cloud based management and stats. No recurring cost for the Pro/Hotzone licensed APs. And you can create a custom splash page with your agreement on it for clients to click through.

@Cazi, wow, I didn't realize that they had those for only $149 and no license required, and I'm a customer!. That's a great price. I have two 16's and a 12 with the Cloud Controller, multiple SSID's, guest splash page, etc. and the technology is pretty great.

I'm using great a lot. Great!

Side note: If this will have it's own direct path to the internet, and it's for customers then I wouldn't worry about a firewall. Just make sure your splash page details that they use the connection at their own risk. Buy the Meraki, throw it up there and walk away.

I'm very suprised that no-one has mentioned getting a cheaper router and use DD-WRT or Tomato on it!
Any thoughts on that idea?
If you do think this will work good as well, what router would you suggest to get for this? (Preferable B/G/N)